<!DOCTYPE html PUBLIC "-//IETF//DTD HTML//EN">
<html>
  <head>
    <meta http-equiv="content-type" content="text/html;charset=utf-8">
    <link href="../style.css" rel="stylesheet" type="text/css">
    <title>PETSc: Copyright</title>
  </head>
  <body>

    <div id="logo">
      <h1>PETSc</h1>
    </div>

    <div id="header">
      <h1><!--begin-->License<!--end--></h1>
    </div>

    <hr>

    <div id="sidebar">
      <ul>
        <li><a href="../index.html">Home</a></li>
        <li><a href="../download/index.html">Download</a></li>
        <li><a href="../features/index.html">Features</a></li>
        <li>
          <a href="../documentation/index.html">Documentation</a>
          <ul>
            <li><a href="index.html">Manual pages and Users Manual</a></li>
            <li><a href="referencing.html">Citing PETSc</a></li>
            <li><a href="tutorials/index.html">Tutorials</a></li>
            <li><a href="installation.html">Installation</a> </li>
            <li><a href="saws.html">SAWs</a></li>
            <li><a href="changes/index.html">Changes</a></li>
            <li><a href="bugreporting.html">Bug Reporting</a></li>
            <li><a href="codemanagement.html">Code Management</a></li>
            <li><a href="faq.html">FAQ</a></li>
            <li><span class="current">License</span></li>
            <li><a href="linearsolvertable.html">Linear Solver Table</a></li>
          </ul>
        </li>
        <li><a href="../publications/index.html">Applications/Publications</a></li>
        <li><a href="../miscellaneous/index.html">Miscellaneous</a></li>
        <li><a href="../miscellaneous/external.html">External Software</a></li>
        <li><a href="../developers/index.html">Developers Site</a></li>
      </ul>
    </div>

    <!--begin-->

    <div id="main">
      <h2>2-clause BSD license</h2>

<pre>
Copyright (c) 1991-2014, UChicago Argonne, LLC and the <a href="http://www.mcs.anl.gov/petsc/miscellaneous/index.html">PETSc Development Team</a>
All rights reserved.

Redistribution and use in source and binary forms, with or without modification,
are permitted provided that the following conditions are met:

* Redistributions of source code must retain the above copyright notice, this
  list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright notice, this
  list of conditions and the following disclaimer in the documentation and/or
  other materials provided with the distribution.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
</pre>

      <p>
        This license DOES NOT apply to any software that may be obtained
        via the <tt>--download-package</tt> option of the PETSc configuration.
        Each of those packages are covered by their own licenses.
      </p>

      <h2>Contributing</h2>
      <p>
        Contributions are preferred via Bitbucket pull request to <a href="https://bitbucket.org/petsc/petsc"><tt>https://bitbucket.org/petsc/petsc</tt></a> or via patches (<a href="https://www.kernel.org/pub/software/scm/git/docs/git-send-email.html"><tt>git send-email</tt></a> or <a href="https://www.kernel.org/pub/software/scm/git/docs/git-format-patch.html"><tt>git format-patch</tt></a>) sent to <tt>petsc-dev@mcs.anl.gov</tt>.  If you are planning a large contribution, we
        encourage you to discuss the concept on the mailing list and interact
        with us frequently to ensure that your effort is well-directed.  See the <a href="https://bitbucket.org/petsc/petsc/wiki/">Development Wiki</a> for further details.
      </p>

      <p>
        PETSc is distributed under a 2-clause BSD license (see above).  The
        act of submitting a pull request or patch (with or without an explicit
        Signed-off-by tag) will be understood as an affirmation of the
        following:
      </p>

      <pre>
  Developer's Certificate of Origin 1.1

  By making a contribution to this project, I certify that:

  (a) The contribution was created in whole or in part by me and I
      have the right to submit it under the open source license
      indicated in the file; or

  (b) The contribution is based upon previous work that, to the best
      of my knowledge, is covered under an appropriate open source
      license and I have the right under that license to submit that
      work with modifications, whether created in whole or in part
      by me, under the same open source license (unless I am
      permitted to submit under a different license), as indicated
      in the file; or

  (c) The contribution was provided directly to me by some other
      person who certified (a), (b) or (c) and I have not modified
      it.

  (d) I understand and agree that this project and the contribution
      are public and that a record of the contribution (including all
      personal information I submit with it, including my sign-off) is
      maintained indefinitely and may be redistributed consistent with
      this project or the open source license(s) involved.
</pre>

      <h3>Old License</h3>

      <p>Previous versions of PETSc were distributed under the <a href="oldlicense.html">old PETSc license<a>.</p>

    </div>

    <!--end-->

    <hr>

  </body>
</html>
